PCF8574T/3,512

The PCF8574T/3,512 is an 8-bit I/O expander for the I²C-bus (Inter-Integrated Circuit bus) manufactured by NXP Semiconductors. It allows you to add additional input/output (I/O) ports to a microcontroller or other devices with limited I/O pins, enabling flexible expansion of the system's capabilities.

Key Features:

• I²C Interface: The PCF8574T/3,512 communicates with the master device (such as a microcontroller) via the I²C bus, a popular serial communication protocol known for its simplicity and versatility.

• 8-Bit Bidirectional I/O: It provides 8 bidirectional I/O pins that can be individually configured as inputs or outputs. These pins can interface with various digital devices, such as switches, sensors, LEDs, and other peripheral devices.

• Programmable Pull-Up Resistors: Each I/O pin features an internal programmable pull-up resistor, which can be enabled or disabled based on the application requirements. This feature simplifies interfacing with open-drain or open-collector devices.

• Address Select Pins: The PCF8574T/3,512 includes address select pins (A0, A1, and A2) that allow you to configure up to eight devices on the same I²C bus, providing scalability and flexibility in system design.

• Low Standby Current Consumption: It has low standby current consumption, making it suitable for battery-powered or energy-efficient applications where power consumption is critical.

• Wide Operating Voltage Range: The device operates over a wide voltage range, typically from 2.5V to 6V, allowing compatibility with a variety of microcontrollers and system configurations.

• ESD Protection: Built-in Electrostatic Discharge (ESD) protection ensures robustness against electrostatic discharge events, enhancing the reliability and longevity of the device.

• Compact Package: Available in compact surface-mount packages, the PCF8574T/3,512 offers space-efficient integration into PCB layouts, saving valuable board space in compact designs.

• RoHS Compliance: Manufactured in compliance with the Restriction of Hazardous Substances (RoHS) directive, ensuring environmental sustainability and compatibility with lead-free soldering processes.

Applications:

• Expand I/O capabilities of microcontrollers and other digital devices
• Interface with various digital sensors, switches, and LEDs
• Control peripherals in embedded systems and IoT devices
• Keypad scanning and LED driving applications
• Industrial automation and control systems
• Consumer electronics and home automation